The Unnecessary Man
It had also shattered the cohesion of Mankind that had been laboriously built up over several millennia. The old U.N. government had gradually welded together the various nations of Earth under one flag, and for nearly two centuries it had run Earth like a smoothly operating machine. But no culture is immortal; even the U.N. must fall, and fall it did.
And, during the chaos that followed, a man named Jerris Danfors had grabbed the loosened reins of government just as Napoleon had done after the French Revolution. Unlike Napoleon, however, Jerris had been able to hold his power without abusing it; he was able to declare himself Emperor of Earth and make it stick. The people wanted a single central government, and they were willing to go back to the old idea of Empire just to get such a government.